Famine events are localized events of voluntary fasting for 30 or 40 hours depending on the region to raise money and awareness for world hunger. These events are usually coordinated by one of various World Vision organizations and are done by youth in church organizations. They have spread internationally, notably the international 30 Hour Famine, also the regional 40 Hour Famine in Australia and New Zealand and the 24 Hour Famine in the United Kingdom. The 30 Hour Famine is the most popular amongst all, spreading across 21 countries.[a]